"But, one is missing!"

The two men checked the papers of Captain Brocq. Juve was right. There was a document missing—Number Six.

"Whew!" murmured the superintendent. "How are we to know whether this document has been dropped in the taxi, or has already been returned by the captain, or whether."...

"Or whether it has been stolen from him," finished Juve.

The supposition which the detective had put into words was so grave, so terrible, so weighty in its consequence that the superintendent cried, in a shaking voice:

"Robbed! Robbed! But by whom? Where? How? On the way from the Place de l'Étoile here? While the body was being brought to the police station?... Juve, it's incredible!"

Juve was walking up and down, up and down. "I don't like affairs of this sort, in which officers are involved, and most particularly officers connected with the Second Bureau of the Military Staff: they require the most careful handling.... You never know where they will lead. These officers are, owing to their functions, the masters of all the military defences of France.... Confound it!"

Juve stopped short. "You had better let me see the body of this poor fellow."

"Certainly!"...

The superintendent led Juve towards one of the rooms, where the corpse of Captain Brocq was: it had been laid down on the floor. Pious hands had lighted a mortuary candle, and, in view of the position held by the dead man, two of the police staff were keeping watch and ward until someone came to claim the body of the deceased.